Armstrong County area

Population and density of Armstrong County

The Census Bureau estimates that 1,843 people lived in Armstrong County on July 1, 2025. That ranks #3,130 of 3,222 county equivalents nationally and #233 of 254 in Texas. Since the April 1, 2020 estimates base of 1,847, the population has declined by 4 (−0.2%), compared with +8.8% for Texas as a whole.

With 909.1 square miles of land, that is 2 people per square mile (0.78 per km²), placing Armstrong County #3,065 nationally for density and #227 in Texas. The median county equivalent has 47 people per square mile; the Texas median is 22. Put another way, there are about 316 acres of land per resident.

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Armstrong County

1 incorporated place lies at least partly in Armstrong County. Together they are home to 1,190 people (64.6%); the other 653 (35.4%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Claude city, with 1,190 residents in the county.

Metropolitan area

Armstrong County is an outlying county of the Amarillo, TX Metropolitan Statistical Area. Its 5 county equivalents have 276,235 residents on 5,151 square miles of land; Armstrong County accounts for 17.6% of the land and 0.7% of the residents. By combined land it ranks #49 of 393 metropolitan areas, and #186 by population. It belongs to the Amarillo-Borger, TX Combined Statistical Area.

ZIP codes

6 ZIP Code Tabulation Areas have land in Armstrong County; 2 of them have most of their land inside the county, and the others mainly cover neighboring areas.

790197903979042790947911879226

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Armstrong County

Armstrong County shares a land border with 5 county equivalents. It has more land than 2 of them. The largest neighbor is Donley County (927 mi²) and the smallest is Swisher County (890.2 mi²). Together with its neighbors, Armstrong County forms a block of 5,459.3 mi² of land, of which it holds 16.7%.

How big is Armstrong County compared with U.S. states?

Armstrong County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.1 times as much. Texas’s county land could hold about 287 areas the size of Armstrong County.

Another way to picture it: the same land area would fill a square about 30.2 miles (48.5 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Armstrong County?

Armstrong County has more land than 2,398 of the other 3,221 county equivalents in the dataset.

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Armstrong County at #921 nationally by total area, 97 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 0.5%, compared with a national county-equivalent median of 1.2% — 0.7 percentage points lower. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Armstrong County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.